From f95a4a932476be2ba99e2fd081e8d2bc6ea12813 Mon Sep 17 00:00:00 2001
From: PikalaxALT <pikalaxalt@gmail.com>
Date: Fri, 15 Dec 2017 09:38:53 -0500
Subject: Import newlib and create makefile

---
 newlib/libc/sys/sysvi386/_longjmp.s | 31 +++++++++++++++++++++++++++++++
 1 file changed, 31 insertions(+)
 create mode 100644 newlib/libc/sys/sysvi386/_longjmp.s

(limited to 'newlib/libc/sys/sysvi386/_longjmp.s')

diff --git a/newlib/libc/sys/sysvi386/_longjmp.s b/newlib/libc/sys/sysvi386/_longjmp.s
new file mode 100644
index 0000000..691409b
--- /dev/null
+++ b/newlib/libc/sys/sysvi386/_longjmp.s
@@ -0,0 +1,31 @@
+/
+/ our buffer looks like:
+/  eax,ebx,ecx,edx,esi,edi,esp,ebp,pc
+/
+/ _longjmp is called with two parameters:  jmp_buf*,int
+/ jmp_buf* is at 4(%esp), int is at 8(%esp)
+/ retaddr is, of course, at (%esp)
+
+	.globl	_longjmp
+	.globl	longjmp
+_longjmp:
+longjmp:
+	movl	4(%esp), %ebx	/ address of buf
+	movl	8(%esp), %eax	/ store return value
+
+	movl	24(%ebx), %esp	/ restore stack
+	movl	32(%ebx), %edi
+/ Next line sets up return address.
+	movl	%edi, 0(%esp)	
+	movl	8(%ebx), %ecx
+	movl	12(%ebx), %edx
+	movl	16(%ebx), %esi
+	movl	20(%ebx), %edi
+	movl	28(%ebx), %ebp
+	movl	4(%ebx), %ebx
+	testl	%eax,%eax
+	jne	bye
+	incl	%eax		/ eax hold 0 if we are here
+bye:
+	ret
+
-- 
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